Як розрахувати Photoelectric
Що таке Photoelectric?
Photoelectric effect is the emission of electrons when light hits a material. It demonstrates light's particle nature and is used in photodiodes and image sensors.
Формула
The calculator applies KE_max = hf - φ
Покрокова інструкція
- 1Enter photon frequency and material's work function
- 2The calculator applies KE_max = hf - φ
- 3Results show maximum electron kinetic energy
Розв'язані приклади
Введення
f = 6 × 10¹⁴ Hz, φ = 2 eV
Результат
KE_max = 2.48 - 2 = 0.48 eV
Using h = 4.136 × 10⁻¹⁵ eV·s
Поширені помилки
- ✕Confusing frequency with wavelength in calculations
- ✕Thinking intensity affects electron kinetic energy
Часті запитання
Why doesn't classical physics explain photoelectric effect?
Classical theory predicts increasing light intensity increases electron kinetic energy, but it doesn't—frequency alone matters.
What's threshold frequency?
Minimum frequency for electron emission: f_threshold = φ/h; below this, no emission regardless of intensity.
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